Gas-lamp.



No. 783,887. PATENTBDPEB. za, 1905. A., 0. NOAD.

GAS LAMP.

APPLIOAIZON FILED JULY 14, 1904.

7.5/2: gzfevued @traites Patented February 28, 1905.

" .WENT OFFICE.

SPECIFCATION forming part of Letters Patent No. 783,887, dated February 28, 1905.

.pplieatien filed July 14,1904. Serial No. 216,537.

`1'11 (1f/, 1071.111111 'it 711,111/ colmo/'11.:

Beit known that I, An'ruUn (UMMiNe NoAn, a citizen oi the United States el America, and a resident ot' (33 Alark `Place, New York city, citateo't' New York, at present residing at l2 Buer road, Fulham, in the county ot' London, England, have invented certain new and uselul improvements in (ias-Lamps, oi which the following is a spcciiication.

T his invention has re'lerence to gas-lamps, particularly incandescence gas-lam ps, and has Vfor its object to provide the lamp with a movable screen or similar device which will protect the ineaiidescence mantles 'from injury by wind or dra'its oi air, to which they would otherwise be exposed when the globe were moved into a position for permitting the inlspection or repair of the mantles, the said screen being' nevertheless so constructed that ready access can be had to the said mantles when the screen is in its protective position.

ln the accompanying drawings, Figure lis a sectional elevation ot an incandescence lamp vconstructed in accordance with my invention, the globe being' represented in its raised or ordinary position. Fig. 2 is a sectional elevation with the globe represented in its lowered positionw-i. e., the position to which it is moved to give access to the mantles. Fig. 3 is a detail vertical section. Fig. i is a sectional plan view showing' a modiiication.

A is the central gas-suppl y tube, which also serves as the support 'for the lamp.

7B is the globe.

C is the draft-screen.

Vl) l) are the burners,and E is the chimney.

The globe is carried by a gallery 7), supported by a bush or collar 7), which is slidably mounted on a tailpiece a, depending from the lower end of the central support A. N orinally the said gallery and the globe it supports are kept in the raised position, Fig. 1, by means ol' a set-screw L2. The lower end el the tailpiece 1 has a screw-threaded plug uf, which is capable oi" acting as a stop-piece to prevent the gallery and globe escaping' Afrom the tailpiece in the event of the set-screw 7) being'accidentally released. rllo enable the gallery and globe to have sul'licient length of downward travel, the tailpieee 11l has a screw threaded aperture in its lower end, to which an extension-piece el rod 11.*) can be connected. '.lhe said extension-piece has its upper end somewhat reduced in diameter, so that when iitted together the tailpiece f1 and extensionpiece 11 constitute a uniiormlysthick guiderod, on which the bush can 'freely slide. At its lower end this rod or extension-piece has a protuberance 11,, which supports the gallery and its globe when they are in their lowered position. Fig. 2. If do not confine myself to the above-stated means for enabling the globe to be shifted into its lowered position, as any other suitable means may be employed for this purpose.

The draft-screen (l is preferably constructed oit' a tube oi sheet metal, although glass or mica might in some cases serve equally well. 1t is furnished with a hinged or sliding door c, which is arranged in such position that when the globe is lowered and carries the screen C down with it said door can be opened to give convenient access to the mantles. The lower end ot' the said screen is provided with a ring` or band c, to which the globe is detacliably connected by means of set-screws di. This ring or band a serves to intercept any air-drafts that might find their way into the lower end of the draft-screen when the globe is in its lowered position. The screen is capable of angular motion, so that in the event ot' there being any wind or local draft the screen can be turned in the desired direction to bring the aforesaid door c into a position remote therefrom, so that said door may then be opened without fear of the mantles being injured by the wind or draft.

The burners l) communicate with the central tube A, and the mantles d 1l are grouped around the said tube, from which they are suspended by arms d d.

The chimney E has at its upper end a cap or dome e, which is connected by a screw 1./ to

the tube A, thereby supporting the entire chimney. When the globe is in its raised position, the said drat`t-screen C lies completely within the said chimney, as represented in Fig. l.

lln order to give additional steadiness to the d raft-screen U and guide the saine in its movement, I may provide its upper part with a spider-frame c3, which when said screen assumes its lowered position will rest upon a collar ff on the tube A, as shown by Figs. 3 and 4.

That Iclaim, and desire to secure by Letters Patent of the United States, is-

1. In an incandescence gas-lamp,the combination with the chimney, the burner and the globe, of a movable draft-screen for the mantles, means for limiting the extent of movement of said draft-screen, and means for affording access to the mantles when the draftscreen is in its protecting position around the mantles.

2. In an incandescence gas-lamp, the combination with the chimney, the burner and the globe, ot' a movable draft-screen for the mantles, means for limiting' the extent of movement of said draft-screen, and a closable opening in said draft-screen for aording access to the mantles when the draft-screen is in its protecting' position around the mantles.

3. 1n an incandescence gas-lamp, the combination with the chimney, the burner, and the globe; of a movable draft-screen for the mantles, means for connecting said draft-screen with the globe so as to move simultaneously therewith, when the latter is raised or lowered, and means for limiting` the extent of movement of said draft-screen substantially as described.

4. In an incandescence gas-lamp, the combination with the chimney, the burner, and the globe; of a movable tubular draft-screen for the mantles, means for connecting said draftscreen with the globe so as to move simultaneously therewith when the latter is raised or lowered, means for limiting the descent of said screen and globe, and means for affording access to the mantles when said screen is in its protective position relatively thereto substantially as described.

5. In an incandescence gas-lamp, the combination with the chimney, the burner, and the globe; of a tubulardraft-screen for the mantles, movable vertically and angularly, means for connecting said draft-screen with the globe so as to move simultaneously therewith when the latter is raised or lowered, means for limiting the descent of said screen and globe, and means on said screen for aiording access to the mantles, when said screen is in its protective position relatively to the man tles substantially as described.

6. In an incandescence gas-lamp, the combination with the chimney, the burner and the globe, of a tubular draft-screen for the mantles adapted to assume a position to protect l with the movement of the globe from its position around the mantles, means for limiting the extent of movement of the draft-screen, and a movable door on said screen for affording access to the mantles when the screen is in its protecting position relatively to the mantles, substantially as described.

'7. In an incandescence gas-lamp, the combination with the chimney, the burner, and the globe; of a tubular draft-screen forthe mantles, movable vertically and angularly, a ring or band located around and connected with the lower end of said screen, means for connecting the globe to said ring or band, means for limiting the descent of the screen and globe, and a sliding' door on said screen for affording access to the mantles, when said screen is in its protective position relatively to the mantles substantially as described.

8. In an incandescence gas-lamp, the combination with the chimney, the burner, and the globe, of a tubular draft-screen for the mantles, movable vertically and angularly, a ring or band located around and connected with the lower end or' the said screen, means for connecting the globe to said ring or band, means for supporting the screen and globe in the raised position, means for limiting the descent of the screen and globe, and a sliding` door on said screen for affording access to the mantles, when said screen is in its protective position relatively to the mantles substantially as described.

9. In an incandescence gas-lamp, the combination with the chimney, the burner, and the globe, of a tubular draft-screen for the mantles, movable vertically and angularly, a ring or band located around and connected with the lower end of said screen, means for detachably connecting the globe to said ring or band, a detachable stop-piece at the lower end of the lamp-support for retaining the globe and screen in their raised position, an extension guide-rod for attachment to the part occupied by said detached stop-piece, terminating in a protuberance for limiting' the descent of said screen and globe, and a sliding door on said screen for affording access to the mantles, when said screen is in its protective position relatively to the mantles substantially as described.

ln testimony whereof I have hereunto set my hand, in presence of two subscribing witnesses, this 30th day of June, 1904.

ARTHUR CUMMING NOAD.

W'itnesses:

T. SELLY IVARDLE,

the mantles from air-drafts simultaneously l/VALTER J. SKERTEN.

IOO 

